201019746 九、發明說明： 【發明所屬之技術領域】 本發明為一種用於一多媒體裝置之多聲道輸出裝置，尤指一 種可節省生產成本，縮小晶片面積，並降低電源消耗的多聲道輸 出裝置。201019746 IX. Description of the Invention: [Technical Field] The present invention relates to a multi-channel output device for a multimedia device, and more particularly to a multi-channel output capable of saving production cost, reducing chip area, and reducing power consumption. Device.
參 【先前技術】 隨著多媒體技術的演進，多媒體裝置輸出聲音的方式已由最 原始的單聲道進步到立體聲及環繞音效等，以提供人們更大的娛 樂享受。然而’多聲道的輸出方式需要耗費更多的資源，因此如 何減少多聲道輸出所需成本已成為業界所努力的目標之一。 以立體聲為例，請參考第i圖，第i圖為習知一立體聲輸出 架構10之示意圖。立體聲輸出架構10包含有運算放大器1〇〇、1〇2 及制叭m、106。運算放大器·、102分別由電源侧1、卿2 及-VSS所驅動，用來將立體聲訊號m—R、取_丄放大，以產生放 大結果OUT—R、〇UT_L，並透過制〇八1〇4、播放。其中 源顆、獅2及-儒係由一電源供應器⑽於第i圖中） 所提供，如電荷果；而立體聲訊號則為-音訊處理 器（亦未緣於第1圖中）戶斤輸出之左、右聲道訊號。 5 201019746 因此由第1圖可知，為了正確處理立體聲訊號既尺、取少 。體是輸出架構丨〇需透過運算放大器⑽、⑽分麟立體聲訊 號IN-R、in—L進行放大處理，以正確播放出左、右聲道的内容。 換句話》兒為了達到立體聲的效果，立體聲輸出架構】〇必需設置 兩個，异放大器100、1G2，除了造成生產成本增加外還需要較 大的曰曰片面積’並會增加電源消耗。更有甚者，隨著聲道數的增 加（如4聲道、5.1聲道等），上述問題會'更明顯。因此，習知多 ❹ 聲道輸出架構實有改進之必要。 【發明内容】 因此本發明的主要目的即在於提供一種用於一多媒體裝置 之多聲道輸出裝置。 ' 本發明揭露—種用於—多媒體裝置之多聲道輸出裝置，包含 藝有複數個接收端，用來接收複數個聲音訊號；—放大器，包含有 輸人端及-輸出端’絲將該輸人端所接收之訊號放大，並由 該輸出端輸出放大結果；複數個聲音輸出裝置，用來根據所接收 之訊號，輸出聲音，·-第一切換元件，輕接於該複數個接收端與 該放大器之該輸入端之間，用來根據一控制訊號，將該複數個接 收端之-接收端耦接於該放大器之該輸入端，以將該接收端所接 收之聲音訊號傳送至該放大器之該輸入端；一第二切換元件輕 接於該放大器之該輸出端與該複數個聲音輸出裝置之間，用來根 據該控制訊號，將該放大器之該輸出端输於該複數個聲音輸出 201019746 裝置之一聲音輸出裝置，以將該放大器之該輸出端所輪出之放大 結果傳送至該聲音輸出裝置；以及一控制單元，輕接於該第一切 換元件及該第二切換元件，用來輸出該控制訊號。 【實施方式】 請參考第2圖，第2圖為本發明實施例一多聲道輸出裝置加 ❿ 之示意圖。多聲道輸出裝置20用於一多媒體裝置（如耳機、家庭 劇院組等），其可降低製造成本。多聲道輸出裝置2〇包含有接收 端PI—1〜PI_n、一放大器200、聲音輸出裝置p〇J〜p〇_m、一 第一切換元件202、一第二切換元件204及一控制單元2〇6。接收 端PI一 1〜PI—η用來接收多媒體裝置之一音訊處理器（未繪於第2 圖中）所輪出的聲音訊號IN一 1〜ΙΝ_η;其中，聲音訊號〜 係對應於不同聲道。第一切換元件202耦接於接收端pij〜n n ❹ 與放大器200之輸入端之間，用來根據控制單元2〇6所產生之一 控制域VCTRL，將接㈣PIJ〜ΡΙ_η之一接收端ρι—χ耗接於 放大器200之輸入端，以將接收端ΡΙ_Χ所接收之聲音訊號沉—乂 傳送至放大器200之輸入端。放大器200由電源vdd &_vss所 驅動，用以將所接收之訊號放大，以依序輸出放大結果〇υτ工〜 OUT—m。第二切換元件204則根據控制訊號VCTRL，將放大器 20〇之輸出端耦接於聲音輸出裝置P〇_l〜P〇—m之一聲音輸出裝 置P〇_y ’以將放大器2〇〇所輸出之放大結果傳送至對應 的聲音輸出裝置P〇_y，從而透過聲音輸出裝置P0_y輸出聲音。 201019746 簡單來說，在多聲道輸出裝置2〇中，控制單元206係透過控 制訊號VCTRL，控制第一切換元件2〇2及第二切換元件2〇4之切 換情形，以達成多輸入多輸出之目的。在此情形下，多聲道輸出 裝置20僅需使用單-放大器2⑻，而不需如f知技術般設置多個 放大器。如此-來，除了可節省生產成本及減小晶片面積外，同 時’由於僅需驅動-個放大II ’因而可大幅降低電源消耗。Reference [Prior Art] With the evolution of multimedia technology, the way multimedia devices output sound has evolved from the most primitive mono to stereo and surround sound, to provide people with greater entertainment. However, multi-channel output requires more resources, so reducing the cost of multi-channel output has become one of the goals of the industry. Taking stereo as an example, please refer to the i-th image, which is a schematic diagram of a conventional stereo output architecture 10. The stereo output architecture 10 includes operational amplifiers 1A, 1〇2 and horns m, 106. The operational amplifiers·102 are driven by the power supply side 1, qing 2 and -VSS, respectively, for amplifying the stereo signals m-R and _丄 to generate amplification results OUT-R, 〇UT_L, and through the 〇8 1 〇 4, play. The source, the lion 2 and the ruthen are provided by a power supply (10) in the figure i, such as the charge fruit; and the stereo signal is the audio processor (also not in the first picture). Output left and right channel signals. 5 201019746 Therefore, as can be seen from Fig. 1, in order to correctly process the stereo signal, both the ruler and the lesser are taken. The output structure is not required to be amplified by the operational amplifiers (10), (10), and the stereo signals IN-R and in-L to correctly play the contents of the left and right channels. In other words, in order to achieve the stereo effect, the stereo output architecture] must be set to two, the different amplifiers 100, 1G2, in addition to the increase in production costs, the need for a larger diaphragm area 'and increase power consumption. What's more, as the number of channels increases (such as 4-channel, 5.1-channel, etc.), the above problem will be 'more obvious.' Therefore, the conventional multi-channel output architecture is necessary for improvement. SUMMARY OF THE INVENTION It is therefore a primary object of the present invention to provide a multi-channel output device for a multimedia device. The invention discloses a multi-channel output device for a multimedia device, comprising: a plurality of receiving ends for receiving a plurality of sound signals; an amplifier comprising an input end and an output end The signal received by the input terminal is amplified, and the output is outputted by the output terminal; a plurality of sound output devices are configured to output a sound according to the received signal, and the first switching component is lightly connected to the plurality of receiving ends. And the input end of the amplifier is configured to couple the receiving end of the plurality of receiving ends to the input end of the amplifier according to a control signal, to transmit the sound signal received by the receiving end to the An input end of the amplifier; a second switching component is lightly connected between the output end of the amplifier and the plurality of sound output devices for outputting the output of the amplifier to the plurality of sounds according to the control signal Outputting one of the sound output devices of the 201019746 device to transmit the amplified result of the output of the amplifier to the sound output device; and a control unit The first switching element and the second switching element are configured to output the control signal. [Embodiment] Please refer to FIG. 2, which is a schematic diagram of a multi-channel output device according to an embodiment of the present invention. The multi-channel output device 20 is used for a multimedia device (e.g., headphones, home theater group, etc.), which can reduce manufacturing costs. The multi-channel output device 2 includes a receiving end PI-1~PI_n, an amplifier 200, a sound output device p〇J~p〇_m, a first switching element 202, a second switching element 204, and a control unit. 2〇6. The receiving end PI-1~PI_η is used for receiving the sound signals IN-1~ΙΝ_η which are rotated by the audio processor (not shown in Fig. 2) of the multimedia device; wherein the sound signal ~ corresponds to different sounds Road. The first switching component 202 is coupled between the receiving end pij nn ❹ and the input end of the amplifier 200, and is used to control the domain VCTRL according to one of the control units 2〇6, and to connect (4) one of the PIJ ΡΙ ΡΙ η to the receiving end ρι— The power consumption is connected to the input end of the amplifier 200 to transmit the sound signal received by the receiving end ΡΙ_Χ to the input end of the amplifier 200. The amplifier 200 is driven by a power source vdd & _vss for amplifying the received signal to sequentially output the amplification result 〇υτ工~OUT-m. The second switching element 204 couples the output end of the amplifier 20〇 to the sound output device P〇_y′ of the sound output device P〇_1~P〇—m according to the control signal VCTRL to The amplified result of the output is transmitted to the corresponding sound output device P〇_y, thereby outputting the sound through the sound output device P0_y. 201019746 In a simple manner, in the multi-channel output device 2, the control unit 206 controls the switching of the first switching element 2〇2 and the second switching element 2〇4 through the control signal VCTRL to achieve multiple input and multiple output. The purpose. In this case, the multi-channel output device 20 only needs to use the single-amplifier 2 (8) without having to set a plurality of amplifiers as in the prior art. In this way, in addition to saving production costs and reducing the area of the wafer, at the same time, the power consumption can be greatly reduced because only the driver-input II is required.
需注意的是’第2騎示之多聲道輸出裝置2G係為本發明之 實施例，本躺具通f知識者當可據不同之修飾，而不限於 此。舉例來說，聲音輸出裝置p〇—HO—讀佳地為勢八，且其 數量m可與接收端ΡΙ」〜PI-n之數量η相等或不相等。若數量n 等於數量m ’表示輸入與輸出之關係為一對一，則控制單元挪 應控制第-切換元件202卩第二切換元件2〇4，依序將聲音訊號 IN_1的放大結果〇υτ 1傳谈5藤立认I «U·It should be noted that the second multi-channel output device 2G is an embodiment of the present invention, and the present invention is not limited thereto. For example, the sound output device p〇-HO-reading is preferably eight, and its number m may be equal or unequal to the number n of receiving ends 〜"-PI-n. If the number n is equal to the number m ' indicates that the relationship between the input and the output is one-to-one, the control unit adaptively controls the first switching element 202 卩 the second switching element 2 〇 4 to sequentially amplify the sound signal IN_1 〇υ τ 1 Talk about 5 rattan recognition I «U·
—讽至聲音輪域置POJ，將聲音訊號 IN_2的放大、纟。果(χπ^傳送至聲音輸域置2以此類推。 相魏，若數量η不等於數量m時，表示輸人與輸出之關係 :對-。例如’若n = 2，㈣，表示多聲道輸出裝置2〇可將雙 聲道立體聲轉換為四聲道環繞音效，則控制料2G6應 mm二切換元物，將聲音訊暖1的放=果 ^UTJ傳送至聲音輸出裝置p〇—i、p〇—2，及將聲音訊號 放大結果QUT—2傳送至聲音輸城置p〇 3、p〇 4。再者，若η的 4 ’ m — 2 ’表4聲道輸域置Μ可將四聲道環繞音轉換為雙 201019746 聲道立體聲，則控制單元206應控制第-切換元件202及第二切 換疋件如4，將聲音訊號1NJ、IN一2的放大結果〇UTJ、〇UT_2 傳送至聲曰輸出裝置p〇j，及將聲音訊號取—3、別—4的放大結 果OUT_3、OUT—4傳送至聲音輸出裝置p〇—2。上述之例僅用以 說月本發月之運作方式，實際上，本領域具通常知識者當可根據 系統所需，做適當之變化，而不限於此。 ❹ 批透過第一切換元件2〇2及第二切換元件204切換輸入 及輸出的對應關係’多聲道輸出裝置2〇僅需單-放大器2〇0,即 可實現多聲道輸出，因而可節省生產成本，縮小晶片面積，並降 低電源消耗。進-步地，本發明可設定第一切換元件2〇2及第二 切換元件20㈣切換頻率大於人耳最大可辨認頻率，如， 以避免使用者聽到斷續聲。換句話說，只要第一切換元件2〇2及 第二切換树2〇4的切換頻率大於人耳最大可辨認頻率，則對人 ❹耳而吕’聲音輸出裝置PO—HO』所發出的聲音為連續不間 斷，進而提升多聲道輸出裝置2〇的聲音品質。 為清楚說明本發明之精神，以下以立體聲為例，即n = m = 2， 請參考第3圖及第4圖。第3圖為多聲道輸出裝置2〇應用於立體 聲輸出時的變化實施例示意圖，而第4圖為多聲道輸出裝置2〇應 用於立體聲輸出時的聲音訊號及對應之放大結果示意圖。由第4 圖可知，控制單元206可控制第一切換元件2〇2及第二切換元件 204，以切換放大器200之輸入端及輸出端的耦接對象，使得多聲 9 201019746 道輸出裝置20做料-放大科可完成左、右聲道喊（即聲 音訊號INJ、IN—2)之放大運算。例如，在時段们中，第一切 換元吁202將接收端PIJ與放大胃2〇〇的輸入端連接，而第二切 換7L件2〇4將放大器200的輸出端與聲音輸出裝置ρο」連接，因 而僅聲音輸出裝置POJ接收到聲音訊號取」的放大結果 〇UT_l ’接著’在時段T2中，第一切換元件2〇2將接收端ρι—2 與放大器·的輸入端連接，而第二切換元件2⑽將放大器· 〇 _出端鱗讀蚊置PO—2連接’ _僅聲音輸錄置p〇—2 接收到聲音訊號IN—2的放大結果ουτ_2。以此_，藉由第一 切換7L件202及第二切換元件2〇4十刀換放大器2〇〇之輸入端及輸 出端的祕對象’多聲道輸出裝置2〇僅需單—放大器·，即可 實現立體聲輸出。因此，本發明可節省生產成本，縮小晶片面積， 並降低電源雜。相較之下，在習知技術中（如第i圖所示），立 體聲輸出架構10需要兩個放大器分別處理左、右聲道的訊號，會 導致生產成本、晶片面積及電源消耗的增加。 綜上所述，本發明係透過第一切換元件及第二切換元件切換 輸入及輸出的對應關係，使得多聲道輸出裝置僅需單一放大器， 即可實現多聲道輸出，進而可節省生產成本，縮小晶片面積，並 降低電源消耗。 以上所述僅為本發明之較佳實施例，凡依本發明申請專利範 圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。 201019746 【圖式簡單說明】 第1圖為習知-立體聲輸出架構之示意圖。 化實施例示意圖 第2圖為本發明實施例—多聲道輸出裝置之示 =^2_讲軸㈣崎軸〜 ❹ 第4圖為第2圖之多聲道輸出裝置應用於立體聲輸出時的聲 音訊號及對應之放大結果示意圖。 【主要元件符號說明】 立體聲輸出架構 電源 運算放大器 味J 0八 立體聲訊號 αυΊ> 放大結果 多聲道輸出裝置 接收端 放大器 聲音輸出裝置 第一切換元件 10- Satire to the sound wheel to set the POJ, the sound signal IN_2 amplification, 纟. If the quantity η is not equal to the quantity m, it means the relationship between the input and the output: -. For example, if n = 2, (4), it means multiple sounds. The channel output device 2 转换 can convert the two-channel stereo to the four-channel surround sound, and the control material 2G6 should switch the meta-objects in mm 2, and transmit the audio signal 1 to the sound output device p〇-i , p〇—2, and transmit the sound signal amplification result QUT-2 to the sound transmission city set p〇3, p〇4. Furthermore, if the η 4 'm — 2 ' table 4 channel input domain can be set When the four-channel surround sound is converted into dual 201019746 channel stereo, the control unit 206 should control the first-switching element 202 and the second switching element such as 4, and the amplification results of the sound signals 1NJ, IN-2 are 〇UTJ, 〇UT_2 It is transmitted to the sonar output device p〇j, and the amplified signals OUT_3, OUT-4 of the audio signal taken to 3, and 4 are transmitted to the sound output device p〇-2. The above example is only used to say the moon. The mode of operation, in fact, those of ordinary skill in the art can make appropriate changes according to the needs of the system, and are not limited thereto.批 Batch switching the correspondence between the input and the output through the first switching element 2〇2 and the second switching element 204. The multi-channel output device 2 requires only a single-amplifier 2〇0, so that multi-channel output can be realized, and thus Saving production cost, reducing wafer area, and reducing power consumption. Further, the present invention can set the switching frequency of the first switching element 2〇2 and the second switching element 20(4) to be greater than the maximum identifiable frequency of the human ear, for example, to avoid use. The speaker hears the intermittent sound. In other words, as long as the switching frequency of the first switching element 2〇2 and the second switching tree 2〇4 is greater than the maximum recognizable frequency of the human ear, the sound output device PO- The sound emitted by HO is continuous without interruption, thereby improving the sound quality of the multi-channel output device. To clearly illustrate the spirit of the present invention, the following stereo is taken as an example, that is, n = m = 2, please refer to FIG. And Fig. 4. Fig. 3 is a schematic diagram showing a variation of the multi-channel output device 2 when applied to a stereo output, and Fig. 4 is a sound signal when the multi-channel output device 2 is applied to a stereo output and corresponding amplification As can be seen from FIG. 4, the control unit 206 can control the first switching element 2〇2 and the second switching element 204 to switch the coupling object of the input end and the output end of the amplifier 200, so that the multi-voice 9 201019746 channel output device The 20-material-magnification section can complete the amplification operation of the left and right channel shouts (ie, the sound signals INJ, IN-2). For example, in the time period, the first switching element calls 202 will receive the terminal PIJ and enlarge the stomach 2〇 The input terminal of the 〇 is connected, and the second switching 7L device 2 〇 4 connects the output end of the amplifier 200 to the sound output device ρο", so that only the sound output device POJ receives the amplified result of the sound signal 〇UT_l 'Next' In the period T2, the first switching element 2〇2 connects the receiving end ρι-2 to the input end of the amplifier, and the second switching element 2(10) connects the amplifier 〇_out end scales to the mosquito PO_2 connection _only sound The input set p〇-2 receives the amplified result ουτ_2 of the sound signal IN-2. In this way, by the first switching 7L member 202 and the second switching element 2〇4, the input end of the amplifier 2〇〇 and the output end of the multi-channel output device 2〇 only need a single amplifier, Stereo output is available. Therefore, the present invention can save production costs, reduce wafer area, and reduce power supply. In contrast, in the prior art (as shown in Figure i), the stereo output architecture 10 requires two amplifiers to separately process the left and right channels, resulting in increased production cost, die area, and power consumption. In summary, the present invention switches the correspondence between input and output through the first switching element and the second switching element, so that the multi-channel output device requires only a single amplifier to realize multi-channel output, thereby saving production cost. , reduce the chip area and reduce power consumption. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should fall within the scope of the present invention. 201019746 [Simple description of the diagram] Figure 1 is a schematic diagram of a conventional-stereo output architecture. 2 is a schematic diagram of a multi-channel output device according to an embodiment of the present invention = ^ 2 _ axis (four) sag axis ❹ Figure 4 is a multi-channel output device of Fig. 2 applied to a stereo output A schematic diagram of the sound signal and the corresponding enlarged result. [Main component symbol description] Stereo output architecture Power supply Operational amplifier T J 0 eight Stereo signal αυΊ> Enlarged result Multi-channel output device Receiver Amplifier Sound output device First switching element 10
VDD1 ' VDD2 ' -VSS 100、102 104、106 IN R > IN L OUT一R、OUT_L、OUT1 20 PI—1 〜PI—η 200 ΡΟ_1 〜PO_m 202 11 201019746 204 206 VCTRL IN—1 〜IN_n 〇 第二切換元件 控制單元 控制訊號 聲音訊號 12VDD1 ' VDD2 ' - VSS 100, 102 104, 106 IN R > IN L OUT - R, OUT_L, OUT1 20 PI - 1 ~ PI - η 200 ΡΟ_1 ~ PO_m 202 11 201019746 204 206 VCTRL IN - 1 ~ IN_n 〇 Two switching element control unit control signal sound signal 12